Water-heater.



PATENTED DBG. 11, 1906."

H. G. MARTIN. WATER HEATER.

APPLIOATION FILED PEB. s. 190e.

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UNITED STATES PATENT OFFICE.

HARRY G. MARTIN, OF RIVERSIDE, CALIFORNIA.

WATER-HEATER.

Application filed February 5,1906. Serial No. 299,636,

T0 @ZZ whom, t may concern:

Be it known that I, HARRY G. MARTIN, a citizen of the United States, residing at Riverside, in the county of Riverside and State of California, `have invented new and useful Improvements in VVater-Heaters for Heating the Water in Steam-Engines, of which the following is a specification.

The object of my invention is to provide handy and economical means to keep the water in an engine, and more particularly in fire-engines, hot at all times with the least consumption of fuel that the engine may be in readiness for operation at any moment.

My invention consists in providing a supplementary heater connected at the top and the bottom with the water in the boiler of the engine and means to heat the supplementary heater.

I accomplish these objects by means of the device described herein and shown in the accompanying drawings, in which- Figure 1 i's a side elevation of the outlines of a fire-engine with my improved heater connected therewith. Fig. 2 is a central vertical section of my improved heater detached from the engine. Fig. 3 is a transverse hori- Zontal section taken on line 3 3 of FiO. 2.

In the drawings, 1 is the boiler of the engine, and 2 is the outer casing of my waterheater in place on the engine, and 3 is the inner casing in the heater. Between the inner and outer casings is an annular space forming a water-jacket 4. This water-jacket is connected at the top with the shell of the boiler by the connecting-pipe 5, which extends down and connects with the shell of the boiler at the bottom thereof, entering as at 6. The water from the boiler will flow into the annular jacket 4 through the pipe 5 and pass downwardly to the bottom of the jacket, whence it will enter the central cylindrical water-chamber 7 through the ports 8, connecting the annular water-jacket and the cylindrical water-chamber together. The water entering the cylindrical chamber 7 at the bottom thereof will be elevated therein and will enter into and fill the radial heatingpipes 9. These radial heating-pipes are screw-threaded into apertures 10 in the casing 11 of the cylindrical water-chamber 7. The outer ends are closed by the'caps 12, Screwed thereon. In the drawings these radial tubes are shown disposed one above the other for clearness of illustration; but in practice these tubes are staggered yinstead of Specification of Letters Patent.

Patented Dec. 11, 1906.

being placed one above the other for the purpose of intercepting the heat as it passes upwardly through the heating-chamber and around these tubes. When the radial heating-pipes become full of water, it will pass vout of the discharge-pipe 13 and thence into the blow-off pipe 14, which extends into and connects with the boiler at the water-line. Between the inner casing 3 of the waterheater and the casing 11 of the water-chamber is a cylindrical heating-chamber 15, into which the radial heating-pipes 9 project. In the bottom vof this heating-chamber is disposed'the4 circular burner 16, fed by gas by the gas-main 17, with which it is connected by the exible hose 18. The purpose of using a flexible rubber hose at this point is to afford a ready means to disconnect the burner and the gas-main and shut off the gas when the engine starts from the enginehouse. Vhen the engine starts from the engine-house, the flexible hose 18 will be detached from the pipe 20, connected with the burner, and the stop-cock 21 will be closed by the action of the chain 19 and shut off the gas from the gas-main. In starting to a fire no time is lost to disconnect the engine from the gas-supply.

The annular burner 1 6 disposed in the bottom of the heating-chamber 15, is provided with a series of ports 22, through which the gas passes. The products of combustion will pass upwardly through the heatingchamber 15 and pass out through the discharge-ports 23 in the top of the heater. The central water-chamber 7 being full of water, the water therein will move upwardly from the bottom thereof and will pass into the connecting-pipe 13 and thence into the boiler, as

'at 24, connecting at the water-line in the boiler, and will gradually pass down the waterleg at the boiler and out, as at 6, into pipe 5 and into the water-jacket 4 at the top thereof, thence to the bottom and through the ports 8. Fresh air will be fed to the heating-chamber through the ports 25 inthe bottom of the heater. By this arrangement a very small amount of fuel is required to always keep the IOO TIO

into the casing 11 are easily removed therefrom and the caps 12 thereon easily removed with an ordinary pipe-Wrench and are readily cleaned of scale, which accumulates in all heating-tubes of this character.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A Water-heater of the character described comprising a casing inclosing a Waterjacket connected at its top with the boiler of the engine at the bottom thereof a central Water-chamber therein connected at the top With the top of the boiler, an annular heating-chamber surrounding the central Waterchamber and inside the Water-j acket and having radial heating-tubes extending outwardly from the casing of the central Water-chamber into the heating-chamber, the said radial heating-tubes being open at their inner ends and closed at'their outer ends, a burner disposed in the bottom of the heating-chamber.

2. The herein-described means to heat the Water in a 'fire-engine and keep the same hot comprising a Water-heater connected to the boiler of the engine by tWo separate pipes, one pipe connecting the top of the boiler with the top of the central Water-chamber in the heater, the other pie connecting the bottom of the boiler Wit 1 the top of the annular Water-jacket surrounding the heater; an annularwater-jacket surrounding said heater; a central Water-chamber connected at the bottom with the annular jacket and having proj ecting radiallyfroin the casing inclosing said central Water-heater a plurality of radiallyextending heating-tubes, the said heatingtubes opening into the central Water-chamber and closed at their outer ends a heatingchamber surrounding the central Waterchamber and having in the bottom thereof means to heat the heating-chamber.

3. The herein-described Water-heater 2 having a Water-jacket 4 therein communicating with the central Water-chamber 7 5 a heating-chamber 15 surrounding the Waterchamber g Water-heating tubes 9 projecting outwardly from the casing of the central Water-heating chamber into the heatingchamber, the said tubes being open at their inner ends and closed at their outer ends, a burner 16 disposed in the bottom of the heating-chamber; the boiler of the engine 1 being connected at the top thereof with pipe 13 leading into and communicating with the top of the central Water-chamber 7 and the bottoni of the boiler being connected with the top of the annular Water-jacket 4 in the heater by the connecting-pipe 5, the central Water-chamber being connected to the annular Water-jacket by ports 8 substantially as herein shown and described, whereby a constant circulation of hot Water is kept up through the heater and the boiler When the fire is burning.

In Witness that I claim the foregoing I have hereunto subscribed my name this 27th day of January, 1906.

HARRY G. MARTIN.

Witnesses:

H. R. MARTIN, W. B. SAWYER. 

